Electronics Forum | Fri Apr 27 11:26:53 EDT 2001 | pteerink
Check out IPC SM-785 Land pattern guidelines for SMT www.ipc.org Phil
Electronics Forum | Thu Apr 26 18:39:45 EDT 2001 | jagman
I'm looking for information (links) to pad design and layout spec's for different sized passive SMD's. To be specific, 0603, 0805, 1206 and 3216 sized parts. I'm most interested in finding out about land spacing between two parts. What is accepabl
Electronics Forum | Thu Jan 23 14:51:33 EST 2020 | jede
I am trying to write a program to pull the feeder location from juki smt files and I am having trouble locating which file this information is located in. Basically what I am trying to accomplish with this program is to automate the set up process w
Electronics Forum | Thu Aug 21 21:08:41 EDT 2003 | Tom B
Correction on note 1: Some can't stand a second peak profile
Electronics Forum | Fri Aug 22 09:21:21 EDT 2003 | russ
Search the Archives, Dave F I believe posted the formula not to long ago. Russ
Electronics Forum | Thu Aug 21 09:01:46 EDT 2003 | caldon
Dan- We here do double sided reflow: we place one side and reflow....place the other side and reflow. On the second flow the underside of the PCB- we will reduce the bottom side preheat. fortunatly for us the largest component we only place a 40pin P
Electronics Forum | Tue Aug 26 21:20:58 EDT 2003 | iman
You may check with the TDS of respective "active parts" IC manufacturers for their recommended no. of thermal cycles permissible in the reflow process. Last I checked 3 cycles for our RF-apps IC was still allowed. For 48pin-QFPs this can be allowed
Electronics Forum | Wed Aug 20 10:27:25 EDT 2003 | Dan Gosselin
Do any of you guys have a list of parts that cannot survive hanging upside down during reflow soldering. As our board designs become increasingly dense and higher speed, we need to use all available pcb real estate. This means locating parts we hi
Electronics Forum | Thu Aug 21 21:05:39 EDT 2003 | Tom B
Dan, We, do alot of double reflow. Your right we typically see alot of the standards components, SOT's, SOIC's, Chip stuff. The largest we do with out adding epoxy is some 32pin PLCC's. We have several assemblies were were doing PLCC44's, Sockets
Electronics Forum | Thu Aug 28 16:13:06 EDT 2003 | Dan Gosselin
Thanks everyone for your help. I have since found a good article I am downloading of of the SMTA website. Dan Title : EFFECT OF SURFACE TENSION OF SOLDER ON UNDERSIDE DEVICE SUPPORT DURING REFLOW OF A PCBA Author : Mulugeta Abtew Author Company
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